Fountain pen



FIG. 1 is a top, right front perspective view of a fountain pen showing my new design;

FIG. 2 is a front elevational view;

FIG. 3 is a right side elevational view, the left side being a mirror image thereof;

FIG. 4 is a rear elevational view;

FIG. 5 is a top plan view;

FIG. 6 is a bottom plan view;

FIG. 7 is a top, right front perspective view in an exploded condition;

FIG. 8 is a front elevational view of FIG. 7;

FIG. 9 is a right side elevational view of FIG. 7;

FIG. 10 is a rear elevational view of FIG. 7; and,

FIG. 11 is a left side elevational view of FIG. 7. 

The ornamental design for a fountain pen, as shown and described. 